Earlier this week, Associate Social Development Minister Chester Borrows announced three new initiatives to clamp down on relationship fraud in the welfare system believed to cost the Government more than $20 million a year.
Mr Burrows said a new offence will be created to target partners or spouses of beneficiaries who are convicted of fraud.
"Currently there are few options available to prosecute partners who know or benefit from such offending, leaving the entire debt with one partner," he said.
Prosecuting partners who benefited from welfare fraud would ensure both parties who profited from the crime were punished, and the debt could be split between the two offenders, and recovered more quickly.
The Social Development Ministry would also be given extended powers to seize partners' assets in order to recover costs, he said.
In addition to the law change, tougher rules would be introduced for beneficiaries who had been dishonest in the past.
Three-quarters of the people who were charged with welfare fraud in the last financial year had previously ripped off the ministry.
These "low-trust" beneficiaries would have more restricted access to self-service transactions and would face more rigorous verification of their personal information.
The ministry would also formalise information sharing with related agencies such as ACC, Inland Revenue, Housing New Zealand and the police.
Collier has been remanded on bail pending sentencing in Tauranga District Court on April 11.